Malicious PDF — malware analysis report

Static analysis result for SHA-256 d302ec26c20d70a0…

MALICIOUS

PDF

67.8 KB Created: 2020-08-11 02:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d91888e6836d0b293ebbd804a09fcb6 SHA-1: 4f62bd063bb37096985e1546ac6b163e712f8fc6 SHA-256: d302ec26c20d70a096cff8aceeba521861cb23f08e57fec775e6d9c9694e5ced
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting a lure for educational materials. The primary malicious URL identified is https://ttraff.ru/pify?keyword=free+3rd+grade+math+workbook+pdf, which is likely used to redirect the user to a further malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=free+3rd+grade+math+workbook+pdf In PDF document text
    • http://pexozosiz.thebankeye.org/uploads/1/3/1/3/131380429/8522862.pdfIn PDF document text
    • http://files.dannyanthonywritings.com/uploads/1/3/2/7/132740291/duwevekimizak-lomizinijujaguk.pdfIn PDF document text
    • http://files.mindfulneuropsych.org/uploads/1/3/2/8/132814589/94d108a36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1119/4525/files/vajapewutiginivive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/telolitanifaxeteroranavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/chemical_reaction_and_equation_class_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0504/1051/files/fepewibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7547/7414/files/kofesomafadojejijox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7217/6799/files/73265210831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5147/3301/files/23333696869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7680/3990/files/xutoxasobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/5730958029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6695/6707/files/mekilukiperevesikiwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/88283285830.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ccf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF3 5660 bytes
SHA-256: 31e69718e087503f217d33ece51449b7cc60bd5d65e555f0bed8983f9bd10649
font_01_sfnt_off0000e02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02A 9988 bytes
SHA-256: 4fe5c6c82ff1c3fd8e79cfaee54b3adb9432061e9b30aed0cf82f759e14fbcac

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